FIG 2.

Growth properties of cloned D/OK. (A) Growth kinetics of cloned D/OK (D/OK-clone) were examined in swine testis (ST) cells. D/OK-clone and original D/OK were inoculated onto cells at a multiplicity of infection (MOI) of 0.01. Virus titers were determined at 12-h intervals postinfection by plaque assay and reported as the mean titer with standard deviations (n = 3). (B) Representative plaque morphology of D/OK-clone in ST cells is shown. The plaques were immunologically stained with mouse anti-D/OK polyclonal antibody.